1*4882a593Smuzhiyun // SPDX-License-Identifier: GPL-2.0-only
2*4882a593Smuzhiyun /*
3*4882a593Smuzhiyun * sky81452.c SKY81452 MFD driver
4*4882a593Smuzhiyun *
5*4882a593Smuzhiyun * Copyright 2014 Skyworks Solutions Inc.
6*4882a593Smuzhiyun * Author : Gyungoh Yoo <jack.yoo@skyworksinc.com>
7*4882a593Smuzhiyun */
8*4882a593Smuzhiyun
9*4882a593Smuzhiyun #include <linux/kernel.h>
10*4882a593Smuzhiyun #include <linux/module.h>
11*4882a593Smuzhiyun #include <linux/init.h>
12*4882a593Smuzhiyun #include <linux/err.h>
13*4882a593Smuzhiyun #include <linux/slab.h>
14*4882a593Smuzhiyun #include <linux/i2c.h>
15*4882a593Smuzhiyun #include <linux/regmap.h>
16*4882a593Smuzhiyun #include <linux/mfd/core.h>
17*4882a593Smuzhiyun #include <linux/mfd/sky81452.h>
18*4882a593Smuzhiyun
19*4882a593Smuzhiyun static const struct regmap_config sky81452_config = {
20*4882a593Smuzhiyun .reg_bits = 8,
21*4882a593Smuzhiyun .val_bits = 8,
22*4882a593Smuzhiyun };
23*4882a593Smuzhiyun
sky81452_probe(struct i2c_client * client,const struct i2c_device_id * id)24*4882a593Smuzhiyun static int sky81452_probe(struct i2c_client *client,
25*4882a593Smuzhiyun const struct i2c_device_id *id)
26*4882a593Smuzhiyun {
27*4882a593Smuzhiyun struct device *dev = &client->dev;
28*4882a593Smuzhiyun const struct sky81452_platform_data *pdata = dev_get_platdata(dev);
29*4882a593Smuzhiyun struct mfd_cell cells[2];
30*4882a593Smuzhiyun struct regmap *regmap;
31*4882a593Smuzhiyun int ret;
32*4882a593Smuzhiyun
33*4882a593Smuzhiyun if (!pdata) {
34*4882a593Smuzhiyun pdata = devm_kzalloc(dev, sizeof(*pdata), GFP_KERNEL);
35*4882a593Smuzhiyun if (!pdata)
36*4882a593Smuzhiyun return -ENOMEM;
37*4882a593Smuzhiyun }
38*4882a593Smuzhiyun
39*4882a593Smuzhiyun regmap = devm_regmap_init_i2c(client, &sky81452_config);
40*4882a593Smuzhiyun if (IS_ERR(regmap)) {
41*4882a593Smuzhiyun dev_err(dev, "failed to initialize.err=%ld\n", PTR_ERR(regmap));
42*4882a593Smuzhiyun return PTR_ERR(regmap);
43*4882a593Smuzhiyun }
44*4882a593Smuzhiyun
45*4882a593Smuzhiyun i2c_set_clientdata(client, regmap);
46*4882a593Smuzhiyun
47*4882a593Smuzhiyun memset(cells, 0, sizeof(cells));
48*4882a593Smuzhiyun cells[0].name = "sky81452-backlight";
49*4882a593Smuzhiyun cells[0].of_compatible = "skyworks,sky81452-backlight";
50*4882a593Smuzhiyun cells[1].name = "sky81452-regulator";
51*4882a593Smuzhiyun cells[1].platform_data = pdata->regulator_init_data;
52*4882a593Smuzhiyun cells[1].pdata_size = sizeof(*pdata->regulator_init_data);
53*4882a593Smuzhiyun
54*4882a593Smuzhiyun ret = devm_mfd_add_devices(dev, -1, cells, ARRAY_SIZE(cells),
55*4882a593Smuzhiyun NULL, 0, NULL);
56*4882a593Smuzhiyun if (ret)
57*4882a593Smuzhiyun dev_err(dev, "failed to add child devices. err=%d\n", ret);
58*4882a593Smuzhiyun
59*4882a593Smuzhiyun return ret;
60*4882a593Smuzhiyun }
61*4882a593Smuzhiyun
62*4882a593Smuzhiyun static const struct i2c_device_id sky81452_ids[] = {
63*4882a593Smuzhiyun { "sky81452" },
64*4882a593Smuzhiyun { }
65*4882a593Smuzhiyun };
66*4882a593Smuzhiyun MODULE_DEVICE_TABLE(i2c, sky81452_ids);
67*4882a593Smuzhiyun
68*4882a593Smuzhiyun #ifdef CONFIG_OF
69*4882a593Smuzhiyun static const struct of_device_id sky81452_of_match[] = {
70*4882a593Smuzhiyun { .compatible = "skyworks,sky81452", },
71*4882a593Smuzhiyun { }
72*4882a593Smuzhiyun };
73*4882a593Smuzhiyun MODULE_DEVICE_TABLE(of, sky81452_of_match);
74*4882a593Smuzhiyun #endif
75*4882a593Smuzhiyun
76*4882a593Smuzhiyun static struct i2c_driver sky81452_driver = {
77*4882a593Smuzhiyun .driver = {
78*4882a593Smuzhiyun .name = "sky81452",
79*4882a593Smuzhiyun .of_match_table = of_match_ptr(sky81452_of_match),
80*4882a593Smuzhiyun },
81*4882a593Smuzhiyun .probe = sky81452_probe,
82*4882a593Smuzhiyun .id_table = sky81452_ids,
83*4882a593Smuzhiyun };
84*4882a593Smuzhiyun
85*4882a593Smuzhiyun module_i2c_driver(sky81452_driver);
86*4882a593Smuzhiyun
87*4882a593Smuzhiyun MODULE_DESCRIPTION("Skyworks SKY81452 MFD driver");
88*4882a593Smuzhiyun MODULE_AUTHOR("Gyungoh Yoo <jack.yoo@skyworksinc.com>");
89*4882a593Smuzhiyun MODULE_LICENSE("GPL v2");
90